Filipinorhynchus diwata Cabras, Obrial and Agbas, 2025

Cabras, Analyn A., Agbas, Daven Jayson D. & Obrial, Graden G., 2025, Filipinorhynchus Cabras gen. nov., with two new species (Coleoptera, Curculionidae, Entiminae, Pachyrhynchini) from Davao de Oro, Mindanao Island, Philippines, Zootaxa 5642 (2), pp. 163-177 : 171-174

Filipinorhynchus diwata Cabras, Obrial and Agbas , sp. nov.

http://zoobank.org/ urn:lsid:zoobank.org:act:5E6AE6B3-E094-4726-9F7F-EB051C79DA29

Figure 3 A–F , Figure 4 E–H

Holotype ( Fig 3 A–C ), male: Philippines — Mindanao Island, Davao de Oro, New Bataan / December 2024 / leg. Local collector. (typed on white card) // HOLOTYPE male / Filipinorhynchus diwata / CABRAS, OBRIAL & AGBAS 2024 (typed on red card)” ( PNM) . Paratype (3 males, 3 females); 1 female: same data as holotype / leg. Local collector ; 3 males, 2 females: Philippines — Mindanao Island, Davao de Oro, New Bataan / May 2025 / leg. Local collector (typed on white card, all Paratypes with additional yellow labels). (1 male, 2 females; deposited at DGC. 1 female; deposited at PNM. 1 male; deposited at CMNC. 1 male; deposited at SMTD) .

Diagnosis.

Filipinorhynchus diwata is easily distinguishable from F. engkanto primarily by its elaborate iridescent pale-yellow and turquoise scaly patterns on the lateral sides of the elytra and prothorax. There are differences in the rostral structure with the V-shaped ridge cut-short before the apical half, and apical margin of the rostrum slightly protruding ( Fig. 5. A & B ); differently shaped aedeagus, ventrally wider at basal 2/3 rd, ventral margin in lateral view, slowly raised from basal 3 rd up to apex with a weakly curved apical protrusion that is pointed at apex at dorsolateral margin ( Fig. 4 ). Additionally, in females, the apical downward protrusion of the elytra of F. diwata is acute and separated, compared to females of F. engkanto , with apical downward protrusion merged (for each elytron), and arcuate near apex at lateral margin of each side ( Fig. 5. C & D ).

Description. Male.

Dimensions: LB: 12.0 mm 4.0 mm (Holotype: 13.0 mm). LR: 1.9 mm 2.5 mm (Holotype: 2.0 mm). WR: 1.5 mm – 2.5 mm (Holotype: 1.8 mm). LP: 3.0 mm–4.0 mm (Holotype: 3.5 mm). WP: 4.0 mm– 4.5 mm (Holotype: 4.0 mm). LE: 8.0 mm–9.0 mm (Holotype: 8.5 mm). WE: 5.0 mm–6.0 mm (Holotype: 5.0 mm). N=4

Integument black, body surface, head and underside, matte; rostrum, legs and tarsus, weakly lustrous.

Head dorsal surface weakly convex; dorsal surface punctate and rugose near margin of eyes; lateral side below eyes rugose, and with patch of elliptical appressed contiguous iridescent turquoise scales interspersed with iridescent pale-yellow, recumbent piliform scales; eyes medium-sized, moderately convex, slightly prominent on outline of head.

Rostrum sparsely punctate on basal half and coarsely punctate on apical half; longer than wide (LR/WR:2.0mm/ 1.5mm); base, constricted with prominently raised subparallel ridges forming conspicuous subtriangular depression between base of rostrum and apex of head, basal half with subtriangular depression and deep median furrow from basal 1/3 to basal 2/3; apical half weakly elevated especially distal margins with indistinct depression on dorsum; lateral view constricted at middle, slightly widened apically, lateral sides below antennal scrobe with suberect setae which are longer anteriorly. Antennal scape as long as funicle, scape reaching anterior margin of eye, flat and expanded apically with sparse suberect setae; funicle also with suberect setae. Funicular segments I and II subequal in length, almost twice longer than wide, segments III to VI as long as wide, shorter than I and II, segment VII significantly wider than I–VI, noticeably wider than long, longer than III and VI, with sparse, medium sized setae; club ellipsoidal.

Prothorax subsquarish, truncate at posterior margin, wider at posterior margin than anterior margin, slightly longer than wide (LP/WP: 3.8mm /4.0mm), punctate on dorsal surface, coarsely rugopunctate at middle to lateral sides, forming a band-like projection, with sparse, minute, subappressed setae on sides. Lateral surface with following scaly markings of round, appressed, contiguous, iridescent pale-yellow and turquois scales: a) two subtriangular scaly markings, one thick, near anterior margin and one thin, before posterior margin, b) confluent at base before coxae. Lateral contour in dorsal view, truncate at base, uniformly wide sub-basally and sub-apically; dorsal contour in lateral view nearly flat.

Elytra long and narrow lanceolate-ovate with furrowed striae (LE/WE:8.0mm/5.0mm), 1.6x longer than wide, twice longer than prothorax, moderately wider than prothorax (WE/ WP: 5.0mm/4.0mm, LE/LP: 8.0mm/ 3.8mm), strial punctures large, closely arranged forming distinct furrows, on each side of dorsum, sparsely covered with erect setae from base to apex,; lateral contour in dorsal view weakly arched, widest before middle; lateral side with following scaly markings of round, appressed, contiguous, iridescent pale-yellow and turquois scales: a) five serpentine stripes in subequal intervals reaching dorsolateral surface, confluent with, b) irregularly shaped stripe along lateral margin widened apically, c) confluence starts before base of elytra and ends subapically. Apex subobtuse.

Legs with weakly clavate femora; femora black covered with minute punctures and setae; apical third of femoral declivity with sparse, small setae. All pairs of tibiae flattened, serrate along inner margins with sparse suberect setae, inner sides punctate or with weak granules subapically; tibiae, mucronate at apex, notably small on hind tibia. Tarsomeres pubescent ventrally. Protarsomere 1 and 2 subtriangular and subequal in length and width; mesotarsomere 1, and metatarsomere 1 subequal, longer than protarsomere 1 and meso- and metatarsomere 2, subtriangular; tarsomere 2 short, triangular, simple; tarsomere 3 bilobed, slightly longer and significantly wider than tarsomeres 1 and 2; tarsomere 5 significantly longer than tarsomere 1; tarsal claws simple and free. Coxae with sparse punctures and short setae; procoxae with scaly patches of elliptical iridescent pale-yellow and turquoise scales anteriorly, interspersed with long, recumbent white setae.

Venter with mesoventrite rugopunctate, with few elliptical, iridescent pale-yellow scales. Metaventrite rugopunctate with short setae, weakly depressed on disc posteriorly, adorned with appressed round elliptical pale-yellow and turquoise scales interspersed with white, recumbent setae on each side. Ventrite I with deep depression at middle of disc, rugopunctate and with sparse setae, bearing two scaly patches of tessellate, round pale-yellow and turquoise scales before ventrite II; ventrite II, punctured with short setae on each puncture, bearing the same scaly patches of ventrite I; ventrites III to V flat, truncate apically with short vibrissae.

Male genitalia and sternite IX as shown in Figure 4 E–H .

Female. Dimensions: LB: 14.0 mm–16.0 mm. LR: 2.0 mm– 2.5 mm. WR: 1.9 mm –2.0 mm. LP: 3.9 mm –4.0 mm. WP: 4.0 mm– 4.7 mm. LE: 10.5 mm –11.0 mm. WE: 6.5 mm –7.0 mm. N=3

Habitus as shown in Figure 3 D–F .

Female ( Figure 3 D–F ) differing from male in the following characteristics: a) elytra longer and wider (LE/ WE 11.0mm/7.0mm, WE/WP 7.0mm/ 4.7mm, LE/LP 11.0mm/4.0mm) than male; b) lateral contour of elytra more arched, interrupted subapically, c) dorsal contour of elytra more flattish, with apical declivity more abrupt; d) serpentine elytral markings reaching dorsal surface of the elytra, e) apex of elytra extended downwards with two acute protuberance (one each elytron), f) ventrites I-V moderately smooth, less punctured and rugose, g) ventrites 1 and 2 convex. Otherwise mentioned, female is similar to the male.

Distribution. Filipinorhynchus diwata is known so far from the type locality in New Bataan, Davao de Oro.

Etymology. The epithet “ diwata ” comes from the Filipino mythology which pertains to the mythical Goddess that is believed to be living in the densely forested mountains of the Philippines guarding the forests. The Goddess is associated with mossy forests that are shrouded in fog in Philippine mythology, a habitat from where the new species was discovered.

Figures

FIGURE 3. Filipinorhynchus diwata. A—male holotype, dorsal view. B—idem, lateral view. C—idem, ventral view. D— female paratype, dorsal view. E—idem, lateral view. F—idem, ventral view. Scale: 1 cm.

FIGURE 4. Aedeagus and sternite IX of Filipinorhynchus. A–D F. engkanto A—aedeagus, in lateral view. B—idem, ventral view. C—idem, dorsal view. D—sternite IX. E–H F. diwata E—aedeagus, in lateral view. F—idem, ventral view. G—idem, dorsal view. H—sternite IX. Scale: 1 mm.

FIGURE 5. Filipinorhynchus: A & B Dorsal view of rostrums (Males): A—Filipinorhynchus enkanto, B—Filipinorhynchus diwata. C & D, apex of elytra (Females): C—Filipinorhynchus enkanto, D—Filipinorhynchus diwata.